Answer
c. 3
Work Step by Step
Given $\cos\theta$ = $\frac{1}{3}$
We know that $\sec\theta$ is reciprocal of $\cos\theta$. Therefore-
$\sec\theta$ = $\frac{1}{\cos\theta}$
Therefore
$\sec\theta$ = $\frac{1}{1/3}$ = 3
Trigonometry 7th Edition
by McKeague, Charles P.; Turner, Mark D.
Published by
Cengage Learning
ISBN 10:
1111826854
ISBN 13:
978-1-11182-685-7
Chapter 1 - Section 1.4 - Introduction to Identities - 1.4 Problem Set - Page 41: 63
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